Triple Eight Triple 8 Roller Derby Wrist Brace – Roller Derby Skate Wrist Guards Size M – Fits 8.0 Inches – 9.0 Inches : Triple Eight Roller Derby Wristsavers – Triple 8 Skate Protective Gear for Roller Derby Skating & Skateboard Protection – Designed & tested by derby girls, for derby girls, these wristguards come with uncompromising protection so you can get your game on. You asked, we delivered. Triple Eight’s newest wristguard was designed with a wider palm splint and snug fit body to withstand the rigors of derby.